449287a2a5
Used extensively on my network over the past month. Reviewed by: pfg, brooks Suggested by: pfg Obtained from: ftp://ftp.am-utils.org/pub/am-utils/ MFC after: 6 weeks Relnotes: yes Differential Revision: D8405
301 lines
8.4 KiB
C
301 lines
8.4 KiB
C
/*
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* Copyright (c) 1997-2014 Erez Zadok
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* Copyright (c) 1990 Jan-Simon Pendry
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*
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* File: am-utils/libamu/strutil.c
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*
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*/
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/*
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* String Utilities.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <am_defs.h>
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#include <amu.h>
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char *
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strnsave(const char *str, int len)
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{
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char *sp = (char *) xmalloc(len + 1);
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memmove(sp, str, len);
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sp[len] = '\0';
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return sp;
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}
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/*
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* Concatenate three strings and store the result in the buffer pointed to
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* by p, making p large enough to hold the strings
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*/
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char *
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str3cat(char *p, char *s1, char *s2, char *s3)
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{
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int l1 = strlen(s1);
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int l2 = strlen(s2);
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int l3 = strlen(s3);
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p = (char *) xrealloc(p, l1 + l2 + l3 + 1);
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memmove(p, s1, l1);
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memmove(p + l1, s2, l2);
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memmove(p + l1 + l2, s3, l3 + 1);
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return p;
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}
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/*
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* Split s using ch as delimiter and qc as quote character
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*/
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char **
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strsplit(char *s, int ch, int qc)
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{
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char **ivec;
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int ic = 0;
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int done = 0;
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ivec = (char **) xmalloc((ic + 1) * sizeof(char *));
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while (!done) {
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char *v;
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/*
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* skip to split char
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*/
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while (*s && (ch == ' ' ? (isascii((unsigned char)*s) && isspace((unsigned char)*s)) : *s == ch))
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*s++ = '\0';
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/*
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* End of string?
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*/
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if (!*s)
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break;
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/*
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* remember start of string
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*/
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v = s;
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/*
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* skip to split char
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*/
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while (*s && !(ch == ' ' ? (isascii((unsigned char)*s) && isspace((unsigned char)*s)) : *s == ch)) {
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if (*s++ == qc) {
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/*
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* Skip past string.
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*/
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s++;
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while (*s && *s != qc)
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s++;
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if (*s == qc)
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s++;
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}
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}
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if (!*s)
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done = 1;
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*s++ = '\0';
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/*
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* save string in new ivec slot
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*/
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ivec[ic++] = v;
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ivec = (char **) xrealloc((voidp) ivec, (ic + 1) * sizeof(char *));
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if (amuDebug(D_STR))
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plog(XLOG_DEBUG, "strsplit saved \"%s\"", v);
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}
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if (amuDebug(D_STR))
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plog(XLOG_DEBUG, "strsplit saved a total of %d strings", ic);
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ivec[ic] = NULL;
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return ivec;
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}
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/*
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* Use generic strlcpy to copy a string more carefully, null-terminating it
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* as needed. However, if the copied string was truncated due to lack of
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* space, then warn us.
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*
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* For now, xstrlcpy returns VOID because it doesn't look like anywhere in
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* the Amd code do we actually use the return value of strncpy/strlcpy.
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*/
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void
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#ifdef DEBUG
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_xstrlcpy(const char *filename, int lineno, char *dst, const char *src, size_t len)
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#else /* not DEBUG */
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xstrlcpy(char *dst, const char *src, size_t len)
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#endif /* not DEBUG */
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{
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if (len == 0)
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return;
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if (strlcpy(dst, src, len) >= len)
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#ifdef DEBUG
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plog(XLOG_ERROR, "xstrlcpy(%s:%d): string \"%s\" truncated to \"%s\"",
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filename, lineno, src, dst);
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#else /* not DEBUG */
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plog(XLOG_ERROR, "xstrlcpy: string \"%s\" truncated to \"%s\"", src, dst);
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#endif /* not DEBUG */
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}
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/*
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* Use generic strlcat to concatenate a string more carefully,
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* null-terminating it as needed. However, if the copied string was
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* truncated due to lack of space, then warn us.
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*
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* For now, xstrlcat returns VOID because it doesn't look like anywhere in
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* the Amd code do we actually use the return value of strncat/strlcat.
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*/
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void
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#ifdef DEBUG
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_xstrlcat(const char *filename, int lineno, char *dst, const char *src, size_t len)
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#else /* not DEBUG */
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xstrlcat(char *dst, const char *src, size_t len)
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#endif /* not DEBUG */
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{
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if (len == 0)
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return;
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if (strlcat(dst, src, len) >= len) {
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/* strlcat does not null terminate if the size of src is equal to len. */
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dst[strlen(dst) - 1] = '\0';
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#ifdef DEBUG
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plog(XLOG_ERROR, "xstrlcat(%s:%d): string \"%s\" truncated to \"%s\"",
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filename, lineno, src, dst);
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#else /* not DEBUG */
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plog(XLOG_ERROR, "xstrlcat: string \"%s\" truncated to \"%s\"", src, dst);
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#endif /* not DEBUG */
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}
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}
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/* our version of snprintf */
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int
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#if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS))
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_xsnprintf(const char *filename, int lineno, char *str, size_t size, const char *format, ...)
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#else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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xsnprintf(char *str, size_t size, const char *format, ...)
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#endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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{
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va_list ap;
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int ret = 0;
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va_start(ap, format);
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#if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS))
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ret = _xvsnprintf(filename, lineno, str, size, format, ap);
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#else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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ret = xvsnprintf(str, size, format, ap);
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#endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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va_end(ap);
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return ret;
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}
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/* our version of vsnprintf */
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int
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#if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS))
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_xvsnprintf(const char *filename, int lineno, char *str, size_t size, const char *format, va_list ap)
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#else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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xvsnprintf(char *str, size_t size, const char *format, va_list ap)
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#endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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{
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int ret = 0;
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#ifdef HAVE_VSNPRINTF
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ret = vsnprintf(str, size, format, ap);
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#else /* not HAVE_VSNPRINTF */
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ret = vsprintf(str, format, ap); /* less secure version */
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#endif /* not HAVE_VSNPRINTF */
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/*
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* If error or truncation, plog error.
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*
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* WARNING: we use the static 'maxtrunc' variable below to break out any
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* possible infinite recursion between plog() and xvsnprintf(). If it
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* ever happens, it'd indicate a bug in Amd.
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*/
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if (ret < 0 || (size_t) ret >= size) { /* error or truncation occured */
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static int maxtrunc; /* hack to avoid inifinite loop */
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if (++maxtrunc > 10)
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#if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS))
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plog(XLOG_ERROR, "xvsnprintf(%s:%d): string %p truncated (ret=%d, format=\"%s\")",
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filename, lineno, str, ret, format);
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#else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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plog(XLOG_ERROR, "xvsnprintf: string %p truncated (ret=%d, format=\"%s\")",
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str, ret, format);
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#endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */
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}
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return ret;
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}
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static size_t
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vstrlen(const char *src, va_list ap)
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{
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size_t len = strlen(src);
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while ((src = va_arg(ap, const char *)) != NULL)
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len += strlen(src);
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return len;
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}
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static void
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vstrcpy(char *dst, const char *src, va_list ap)
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{
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strcpy(dst, src);
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while ((src = va_arg(ap, const char *)) != NULL)
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strcat(dst, src);
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}
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char *
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strvcat(const char *src, ...)
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{
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size_t len;
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char *dst;
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va_list ap;
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va_start(ap, src);
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len = vstrlen(src, ap);
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va_end(ap);
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dst = xmalloc(len + 1);
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va_start(ap, src);
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vstrcpy(dst, src, ap);
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va_end(ap);
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return dst;
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}
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